There are a few changes in glibc-2.10 that might make your software fail to build with it, please refer to my blog post  if you're not sure what the problem is.
And no I don't usually provide emerge --info with these bugs because they are caused by glibc-2.10!
Created attachment 194771 [details]
Created attachment 198425 [details, diff]
Rename function getline to avoid redeclaration.
This patch rename the getline function in bdfgname.c because it is also declared in glibc-2.10.1.
Created attachment 198427 [details, diff]
Change ebuild to apply patch.
+ 08 Aug 2009; Samuli Suominen <email@example.com> gbdfed-1.4.ebuild,
+ Fix building with GLIBC 2.10+ wrt #274218, thanks to Alexander Meinke for